Deken's config file lives in `~/.deken/config`.

Here are the possible values:

 * `username` = Username on puredata.info for uploads.
 * `password` = Password on puredata.info for uploads.
 * `gpg_home` = Path to treat as GPG's homedir - defaults to GPG's default.
 * `key_id` = The key ID to use when signing binary packages - defaults to your secret key.
 * `gpg_agent` = Tell deken to invoke GPG with the `--use-agent` flag.

All values are optional.
